Cutting-off and dowel-socket-boring or tenon-forming machine.



No. 689,035. Patented Dec. l7, l90l. E. F. BRAINARU. CUTTING-OFF ANDDOWEL SOCKET BORING UR TENUN FGRMING MACHINE.

[Application filed. Apr. 8, 1901.\

(No Model.

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.lllllll n-au Jun/641% fiw ETEWY 1'77 No. 689,035. Patented Dec. 17,I901.

E. F. BRAINARD. CUTTING-OFF AND DOWEL SOCKET BORING 0B TENON FORMINGMACHINE.

(Application filed Apr. 8, 1901.)

(No Model.) 2 Sheets- Sheet 2.

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UNITED STATES PATENT D FFIGE.

EDWIN F. BRAINARD, OF GARDNER, MASSACHUSETTS, ASSIGNOR TO LEVI G.MCKNIGHT, DOING BUSINESS UNDER THE FIRM-NAME OF L. G. MCKNIGHT & (10.,OF GARDNER, MASSACHUSETTS. I

CUTTING-OFF AND DOWEL-SOCKET-BORING OR TENON-FORMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 689,035, dated December17, 1901.

Application filed April 8, 1901. SEIl'aINO. 54,837. (No model.)

To ctZZ whom it may concern:

Be it known that I, EDWIN'F. BRAINARD, a citizen of the United States,residing at Gardner, in the county of Worcester and State ofMassachusetts, have invented a new and useful Cutting-Off andDowel-Socket-Boring or 'Tenon-Forming Machine, of which the following isa specification.

This invention relates to that class of woodro working machines whichare employed for cutting out pieces for making up chair-frames orsimilar purposes and which are designed to square off the ends of thework and bore the dowel-sockets therein or form tenons I5 thereon; andthe especial object of this invention is to improve this class ofmachines and enlarge the range of work for Which the same may beemployed by adapting the machine for the production of oblique-ended 2oframe-pieces-such, for example, as the side pieces employed in boxchair-seats or similar locations.

To this end this invention consists of the squaring-off anddoWel-socket-boring mar5 chine or tenon-forming machine and of thecombinations of parts therein, as hereinafter described, and moreparticularly pointed out in the claims at the end of this specification.

In the accompanying two sheets of drawings, Figure l is a side view of amachine constructed according to this invention. Fig. 2 isa detailviewof the connections for operating the tool-carriages. Fig. 3 is atransverse sectional view of the machine, taken on the line 3 3 of Fig.1; and Fig. 4. is a perspective view illustrating the manner in whichthe work is supported on the carriage and the relation of the drills orother tools thereto when the machine is adjusted to produce oblique- 0ended work.

In many classes of work, especially in framing box-seated chairs,theWooden strips which form the sides of the chair-seat have oblique endsor end faces which are not at right angle'swiththeirsides. Noneof themachines which have heretofore been employed for this class of work, sofar as I am acquainted with the same, have been designed forsimultaneously cutting off the ends of the oblique-ended pieces beforereferred to or have been capable of simultaneously boring dowel-socketsin such pieces or forming tenons thereon.

The especial object of myinventionis therefore to provide a simple,efficient, and inexpensive machine which is designed to simultaneouslysaw or square off the ends of Wooden pieces at oblique angles with theirsides and to thereafter simultaneously bore dowelsockets in the oppositeends of said pieces or form tenons thereon. To accomplish this ob- 6oject, a machine constructed according to this invention comprises asupport for holding the work in an inclined position, so that the samemay be presented to two circular saws, so that the ends thereof will becut off at the desired 6 5 angle, and two sets of tools which maybe setto different relative horizontal planes and simultaneously operated tobore dowel-sockets in opposite ends of the work.

Referring to the accompanying" drawings and in detail, a machineembodying this invention, as herein illustrated, comprises a frame orbed-piece A, supported on suitable legs B. Dovetailed into thebed-pieceAandv longitudinally adjustable thereon at one end of the frameis a supporting-carriage 10, and longitudinally adjustable on the frameA, near its opposite end, is a supporting-car riage 11. I

In setting the machine to different lengths of stock thesupporting-carriages 10 and 11 r are set to different relativelongitudinal positions on the bed-piece A. Formed integrally with orsecured to the supporting-carriage 11 is a guide frame or well 12, andvertically movable in the guide frame or Well12 is a square plunger orframe 13, carrying a supporting-plate 14 at its upper end. Movablymounted in the supporting-carriage 11 and plate 14 are thetool-carriages 15 and 16. The spindles and driving-gear for turning thesame in the carriages 15 and 16 are similar in construction, and areference to one-such set of parts willsuifice. As herein illustrated,this mechanism comprises a screw 18 for 5 transversely adjusting abearing-piece 17, journaled in which are the spindles 19. As

herein illustrated, there are three spindles 19 in each set, and saidspindles are'geared together by any of the usual connections, so

that they may be turned or driven by driving-belts 20.

Near its center the frame or bed-piece A is provided with a frame 21,vertically adjustable, in which is a support 22, and dovetailed onto thesupport 22 is a transversely-movable carriage 23. Adjustably secured atone end of the carriage 23, as most clearly illustrated in Fig. 4, is ajig or end piece 24 for holding the work W at different relativeinclinations. The work IV may be clamped in place in its carriage 23 byany of the ordinary clamping devices, which need not be herein describedor shown, and cooperating with the carriage 23 are two cross-cutcircular saws S for cutting or trimming off the ends of the stock tomake the same of proper length.

The operating connections for moving up the drills or other tools tobore dowel-sockets in the ends of the work or to form tenons thereoncomprise a pulled-down strip 25, controlled from atreadle. Connected tothe strip 25 is a link 26 for operating a bell-crank lever 27, journaledin the frame of the machine and connected to operate the carriage 16,and also connected to the strip 25 is a link 28, adjustably connected bya bolt 30 to a link 29, which is connected to operate a bell-crank lever34, pivoted in the plunger or verticallymovable frame 13 and connectedat its upper end to operate the tool-carriage 15.

In adjusting and operating a machine as thus constructed thecarriage-jig 24 is first set to support the work at the desiredinclination, and the vertically-movable plunger or frame 13 is raised bymeans of a hand-wheel 31 to bring its set of tools to a sufficientlyhighelevation to properly engage the ends of the work. Thevertically-movable plunger or frame 13 may be clamped in its adjustedposition bya clamp-bolt 33, and threaded in the well or frame 12 Ipreferablyemploy stopbolts or bottom screws 32,which limit the distanceto which the plunger or frame 13 can be lowered, so that when the samehas been lowered far enough to rest on said screws 32 the two sets oftools will be brought to the same horizontal plane, so that the machinewill be adapted for use on square-ended work.

In the drawings I have illustrated the spindles 19 as provided withordinary drills or boring-bits for forming dowel-sockets in the oppositeends of the work.

If instead of formingdowel-sockets in the work it is desired to formtenons thereon, the ordinary cutting tools or chucks may be substitutedfor the drills, as in the ordinary practice with'machines of this kind.

When the machine is properly adjusted to produce the work desired, theends of the wooden piece being operated upon will be sawed off by thecircular saws S when the carriage is moved transversely, and thecarriage then being drawn back the two sets of drills may besimultaneously advanced by the treadle connections before referred to tobore dowel-sockets in the opposite ends thereof.

In the machine as herein illustrated I have shown only one of thetool-carriages supported on a vertically-movable support. It is to beunderstood, however, that both of said carriages may be mounted onvertically-adjustable supports if it is desired to' give the machine awider range of adjustment than herein illustrated.

I am aware that numerous changes may be made in myimproved machine bythose who are skilled in the art without departing from the scope of myinvention as expressed in the claims. I do not wish, therefore, to belimited to the construction which I have herein shown and described; but

What I do claim, and desire to secure by Letters Patent of the UnitedStates, is-- 1. In a machine for simultaneously boring dowel-sockets inframe-pieces for chairs or similar purposes, the combination of asupport for holding the work in an inclined position, tools for engagingtheopposite ends of the work, means for setting the tools at oppositeends of the work to different elevations, and connections for operatingsaid tools, substantially as described.

2. In a machine of the class described, the combination of atransversely-movable carriage, means for supporting the work thereon inan inclined position, saws cooperating with said carriage for cuttingthe work to length, cutting-tools such as drills for boring dowelsocketsin opposite ends of the work, means for setting said drills to differentelevations, and connections for operating said drills, substantially asdescribed.

3. In a machine of the class described, the combination of a bed-pieceor frame, primary carriages longitudinally adjustable thereon,alongitudinally-movable tool-carriage mounted in one of the primarycarriages, a vertically-movable frame or plunger mounted in the otherprimary carriage, an adjustingscrew for setting the same to differentelevati0ns,-a second tool-carriage longitudinally movable upon thevertically-movable plunger or frame, means for supporting the work in aninclined position, and treadle connections for simultaneously operatingsaid tool car riages, substantially as described.

4. In a machine of the class described, the combination of a frame orbed-piece, primary carriages adjustable thereon, a tool-carriage mountedin one of the primary carriages, a vertically-movable plunger or framemounted in the other primary carriage, an adjusting screw for settingthe same to difierent elevations, a clamping-bolt for holding the'samein its adjusted position, a second tool-carriage carried by thevertically-movable plunger or frame, a transversely-movablework-carriage having means for supporting the work in an inclinedposition, circular saws cooperating therewith for cutting the work tolength, and treadle-controlled connections for simultaneously operatingthe tool-carriages, substantially as described.

IIC'

5. In a machine of the class described, the combination of a frame orbed-piece,a primary carriage longitudinally adjustable thereon, atool-carriage mounted in one of the primary carriages, avertically-movable plunger or frame mounted in the other primarycarriage, an adjusting-screw for setting the same to differentelevations, a second tool-carriage carried by the verticallymovableplunger or frame, an operating bell-crank for the firstnamedtool-carriage journaled in the frame of the machine, an operatingbell-crank for the second-named tool-carriage journaled in thevertically-movable plunger or frame, and a treadle mechanism foroperating said bellcranks, said treadle mechanism having an adjustableconnection With the second-named bell-crank, substantially as described.

6. In a machine of the class described, the combination of a frame orbed-piece, primary carriages longitudinally adjustable thereon, atool-carriage mounted in one of said primary carriages, avertically-movable plunger or frame mounted in the other of said primarycarriages, a second tool-carriage supported by the vertically-movableplunger or frame, a transversely-movable work-carriage, means forsupporting the Work in an inclined position therein, circular sawscooperating with said work -carriage, and operating connections for thetool-carriages comprising a bellcrank lever pivoted in the frame andconnected to operate the first-named tool-carriage, a bell-crank leverpivoted in the vertically-movable plunger or frame for operating thesecond-named tool-carriage, and a treadle mechanism having an adjustableconnection with the last-named bell-crank, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

EDWIN F. BRAINARD. Witnesses:

THATCHER B. DUNN, FLORENCE L. MOORE.

